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Dog losing weight on Gabapentin for knee pain? What should I do?

Updated On September 23rd, 2025

My dog was given Gabapentin for his knee problem and now is losing weight. What should I do?

1 Answer

Most Helpful Answer

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Answered By Sabina Snyder, Specialty Surgery Technician

Veterinary Technician

Published on November 25th, 2014

Gabapentin is a pain medication that can have various side effects in animal. Weight loss is not a very common side effect, but pain can cause animals to want to eat less. I would talk with your veterinarian and discuss this issue. It is possible that this medication is not fully effective for your dogs pain and so your dog is not wanting to eat. It is also possible that there is something else going on with your dog. Your vet should run bloodwork to ensure that there are no other issues going on with your pet that would cause the loss of appetite.

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